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Java Concurrency Interview Questions and Answers

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Ques 6. How does the wait-notify mechanism work in Java?

wait() and notify() are methods used for inter-thread communication. wait() makes a thread wait until another thread invokes notify() or notifyAll().

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Ques 7. Explain the concept of deadlock.

Deadlock occurs when two or more threads wait indefinitely for each other to release the resources, resulting in a situation where no thread can proceed.

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Ques 8. What is the ConcurrentHashMap class?

ConcurrentHashMap is a thread-safe implementation of the Map interface, providing high concurrency without the need for explicit synchronization.

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Ques 9. Explain the Phaser class in Java.

Phaser is a synchronization barrier that allows a set of threads to wait for each other to reach a common phase before proceeding.

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Ques 10. What is the ForkJoinPool in Java?

ForkJoinPool is a specialized implementation of ExecutorService designed for parallel processing and efficient handling of recursive algorithms.

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